†family Orthorhynchulidae Cooper 1956 (lamp shell)

Rhynchonellata - Rhynchonellida - Orthorhynchulidae

Parent taxon: Rhynchotrematoidea according to A. Williams et al. 2002

See also Rõõmusoks 1964

Sister taxa: Leptocoeliidae, Machaerariidae, Phoenicitoechiidae, Rhynchotrematidae, Trigonirhynchiidae, Trigonorhynchiidae

Subtaxa: Orthorhynchula Orthorhynchuloides Orthorhynchyllion Tasmanella Tuvaerhynchus

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Type: Orthorhynchula

Ecology: stationary epifaunal suspension feeder

Distribution:

• Silurian of Mongolia (2 collections), the Russian Federation (2)

• Ordovician of Australia (1), Canada (3: Quebec), Peru (1), the United Kingdom (1), United States (48: Georgia, Kentucky, Maryland, Ohio, Tennessee, Virginia)

Total: 58 collections each including a single occurrence

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